NASA's 20-Year-Old Mars Spacecraft Still Going Strong

NASA's Mars Odyssey spacecraft and Mars Reconnaissance Orbiter (MRO) have been operating for over 20 years, a feat that has exceeded their initial expected lifetimes of just a few years. The Mars Odyssey spacecraft arrived at Mars on October 24, 2001, and has been providing valuable insights into the Martian surface ever since.

The two spacecraft have been instrumental in providing a better understanding of the Martian surface, including the presence of ice and changes in surface features over time. They have also served as communication relays for NASA's Mars rovers, which are unable to communicate directly with Earth.

One of the key factors contributing to the spacecraft's longevity is NASA's use of redundant systems, which ensures continued operation in case of component failure. The MRO also uses a unique method to determine its precise location and orientation by comparing what its instruments see with what it expects to see.

According to Briony Horgan, a planetary scientist at Purdue University, the Mars Odyssey spacecraft and MRO are 'critical' to NASA's overall Mars research program. Rob Lillis, a planetary and space physicist at the University of California, Berkeley, notes that a Mars craft must be able to manage by itself due to limited bandwidth.

## Why it matters The continued operation of the Mars Odyssey spacecraft and MRO has significant implications for NASA's Mars research program. The valuable insights and data provided by these spacecraft have rewritten the story of water on Mars, past and present. The ability of these spacecraft to communicate with Mars rovers has also enabled scientists to conduct extensive research on the Martian surface.

The longevity of these spacecraft is a testament to the great engineering and problem-solving skills of NASA's team. However, scientists wonder whether these spacecraft will be the last of their kind, at least for the Red Planet, due to the harsh environment of space and the limited bandwidth available for communication.

## What happens next As the Mars Odyssey spacecraft and MRO continue to operate, they will likely remain critical components of NASA's Mars research program. Their ability to provide valuable insights and support communication with Mars rovers will continue to be essential for scientists conducting research on the Martian surface. However, the limited bandwidth and harsh environment of space will continue to pose challenges for these spacecraft, and it remains to be seen how long they will be able to continue operating.